JP3337249B2 - Liquid level adjustment device for cryogenic liquid containers - Google Patents
Liquid level adjustment device for cryogenic liquid containersInfo
- Publication number
- JP3337249B2 JP3337249B2 JP33156692A JP33156692A JP3337249B2 JP 3337249 B2 JP3337249 B2 JP 3337249B2 JP 33156692 A JP33156692 A JP 33156692A JP 33156692 A JP33156692 A JP 33156692A JP 3337249 B2 JP3337249 B2 JP 3337249B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- low
- container
- temperature
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超伝導コイルの冷却等
に使用される低温液体の保存、運搬用として用いられる
低温液体容器用の液面調整装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level adjusting device for a cryogenic liquid container used for storing and transporting a cryogenic liquid used for cooling a superconducting coil.
【０００２】[0002]
【従来の技術】従来のこの種の低温液体容器用の液面調
整装置として液面位が低下した場合に、低温液体を自動
補充する手段を備えたものがある。図４はその一例を示
す図で、１は冷却対象機材、２は低温液体、３は低温液
体容器、９は内圧監視用圧力計、１０は汎用の弁、１１
は低温液体供給管である。2. Description of the Related Art A conventional liquid level adjusting device for a low-temperature liquid container of this type is provided with a means for automatically replenishing a low-temperature liquid when the liquid level is lowered. FIG. 4 is a view showing an example thereof, wherein 1 is a cooling target device, 2 is a low-temperature liquid, 3 is a low-temperature liquid container, 9 is a pressure gauge for monitoring internal pressure, 10 is a general-purpose valve, 11
Is a low temperature liquid supply pipe.
【０００３】[0003]
【発明が解決しようとする課題】従来の低温液体容器用
の液面調整装置では蒸発等によって液面位が低下した場
合、低温液体を補充することによってしか液面位を維持
調整することができなかった。このため、例えば、輸送
用低温液体容器の場合のように低温液体の補充が困難な
場合における液面調整装置としては適用できないという
問題があった。また低温液体容器が冷凍装置等とシステ
ムを構成している場合であって、冷凍機の故障により緊
急に低温液体の補充が必要となった場面には対応できな
いという問題があった。In the conventional liquid level adjusting device for a low temperature liquid container, when the liquid level is lowered due to evaporation or the like, the liquid level can be maintained and adjusted only by replenishing the low temperature liquid. Did not. For this reason, for example, there is a problem that it cannot be applied as a liquid level adjusting device when replenishment of the low-temperature liquid is difficult as in the case of a low-temperature liquid container for transportation. Further, when the low-temperature liquid container constitutes a system with a refrigerating device or the like, there is a problem that it is not possible to cope with a situation where replenishment of the low-temperature liquid is urgently required due to a failure of the refrigerator.
【０００４】本発明の目的は、低温液体容器に低温液体
の補充を行なわずに液面位を所要レベルに維持・増加若
しくは減少制御することのできる低温液体容器用液面調
整装置を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid level adjusting apparatus for a low temperature liquid container which can maintain, increase or decrease the liquid level at a required level without replenishing the low temperature liquid container. It is in.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決し目的を
達成するために、本発明は、圧力を上げることにより比
容積が上がる特性を有する低温液体を収容する低温液体
容器内における前記低温液体の液面位を調整するための
低温液体容器用液面調整装置において、前記低温液体容
器の圧力を制御して、前記低温液体の比容積を制御する
比容積制御手段と、この比容積制御手段により比容積を
制御される前記低温液体の蓄熱及び又は放熱を行って前
記低温液体の蒸発量を制御する蒸発量制御手段とを備
え、前記低温液体容器内の圧力調整を行なうことによっ
て液面位を制御するようにした。In order to solve the above-mentioned problems and to achieve the object, the present invention is to increase the pressure by increasing the pressure.
Cryogenic liquid containing cryogenic liquid with volume increasing characteristics
For adjusting the liquid level of the cryogenic liquid in the container.
In liquid level adjusting means for a cryogenic liquid container, by controlling the pressure of the cryogenic liquid container, for controlling the specific volume of the cryogenic liquid
A specific volume control means, before performing the heat storage and or dissipating of the cryogenic liquid to be controlled specific volume The specific volume control means
And an evaporation amount control means for controlling an evaporation amount of the low-temperature liquid , and a liquid level is controlled by adjusting a pressure in the low-temperature liquid container.
【０００６】[0006]
【作用】上記手段を講じた結果、次のような作用が生じ
る。液体ヘリウム、液体窒素などの低温液体にて冷却・
保冷を行う低温容器に内圧調整手段を設け低温液体の物
性を利用して、低温液体雰囲気圧力を制御し、その沸点
をコントロールするようにすると、沸点の変化に伴い低
温液体の比容積、比熱などが変化する。この現象に基づ
いて低温液体の容積は増加あるいは減少することにな
る。これと同時に、低温液体への侵入熱を潜熱として、
低温液体の蓄熱あるいは放熱を行なうようにする。かく
して圧力調整のみで液面位を制御することが可能とな
る。The following effects are obtained as a result of taking the above measures. Cool with a low-temperature liquid such as liquid helium or liquid nitrogen
When the internal pressure adjusting means is provided in the low-temperature container that keeps cool and the physical properties of the low-temperature liquid are used to control the low-temperature liquid atmospheric pressure and its boiling point is controlled, the specific volume of the low-temperature liquid, specific heat, etc. Changes. Based on this phenomenon, the volume of the cryogenic liquid will increase or decrease. At the same time, the heat of penetration into the low-temperature liquid is used as latent heat,
Heat storage or heat dissipation of the low-temperature liquid is performed. Thus, the liquid level can be controlled only by adjusting the pressure.
【０００７】[0007]
【実施例】図１は本発明の一実施例に係る低温液体容器
用液面調整装置の構成を示す図である。１は低温液体を
必要とする機器又は材料、２は低温液体、３は低温液体
を保持する低温液体容器（クライオスタット）、４は低
温液体を加圧するガスを保持する容器である。５，８は
低温容器内の圧力を必要圧に維持する圧力設定機能を有
する圧力調整弁であり、５はガス供給用の弁、８はガス
放出用の弁である。６は前記容器４にガスを供給するた
めの圧力調整弁（比容積を制御する比容積制御手段及び
液体の蒸発量を制御する蒸発量制御手段）、７は前記容
器４に圧力ガスを供給するガス源、９は低温容器内圧監
視用圧力計、１０は汎用の弁、１１は低温液体を供給す
る供給管、１２は内圧調整用排気ポンプである。以下本
実施例の装置の液面位調整装置の原理について詳しく説
明する。FIG. 1 is a view showing a configuration of a liquid level adjusting device for a low-temperature liquid container according to an embodiment of the present invention. Reference numeral 1 denotes a device or material that requires a low-temperature liquid, 2 denotes a low-temperature liquid, 3 denotes a low-temperature liquid container (cryostat) that holds the low-temperature liquid, and 4 denotes a container that holds a gas that pressurizes the low-temperature liquid. Reference numerals 5 and 8 denote pressure regulating valves having a pressure setting function for maintaining the pressure in the low-temperature container at a required pressure, 5 denotes a gas supply valve, and 8 denotes a gas discharge valve. 6 is a pressure regulating valve (specific volume control means for controlling specific volume and
Evaporation amount control means for controlling the amount of evaporation of liquid), 7 a gas source for supplying pressure gas into the container 4, 9 cryocontainer pressure monitoring pressure gauge, 10 is a general purpose of the valve 11 supplies a cryogenic liquid The supply pipe 12 is an exhaust pump for adjusting the internal pressure. Hereinafter, the principle of the liquid level adjusting device of the apparatus of the present embodiment will be described in detail.
【０００８】低温液体を含め一般液体は蒸気圧に対応し
た沸騰温度を示す。沸騰温度が決定されると、その温度
に対応して密度（比容積の逆数）、蒸発潜熱、比熱が変
化する。図２の（ａ）（ｂ）（ｃ）は液体ヘリウムの例
を示す図である。 （１）低温容器内の圧力による沸点及び比容積ｖ（＝１
／ρ）の関係 低温容器内圧がＰ0 からＰ1 （Ｐ1 ＞Ｐ0 ）に変化した
とすると、沸点及び比容積は下表となる。[0008] General liquids including low-temperature liquids exhibit a boiling temperature corresponding to the vapor pressure. When the boiling temperature is determined, the density (the reciprocal of the specific volume), the latent heat of evaporation, and the specific heat change according to the temperature. FIGS. 2A, 2B and 2C are diagrams showing examples of liquid helium. (1) Boiling point and specific volume v (= 1)
/ Ρ) Assuming that the internal pressure of the low-temperature vessel changes from P 0 to P 1 (P 1 > P 0 ), the boiling point and specific volume are as shown in the table below.
【０００９】[0009]
【表１】 ここで、Ｔ1 ＞Ｔ0 ，ｖ1 ＞ｖ0 （１／ρ1 ＞１／
ρ0 ） この際、低温容器内の液体質量をＭとすると、変化する
容積δＶは、 δＶ＝Ｍ（ｖ1 −ｖ0 ） …（１） となる。よって容積は増加し、低温容器内の液面位は上
昇する。 （２）低温容器内の圧力変化に伴う低温液体蒸発量の変
化[Table 1] Here, T 1 > T 0 , v 1 > v 0 (1 / ρ 1 > 1 /
ρ 0 ) At this time, assuming that the liquid mass in the low-temperature container is M, the changing volume δV is as follows: δV = M (v 1 −v 0 ) (1) Therefore, the volume increases and the liquid level in the cryogenic vessel rises. (2) Change in low-temperature liquid evaporation due to pressure change in the low-temperature container
【００１０】低温容器内の圧力がＰ0 からＰ1 （Ｐ1 ＞
Ｐ0 ）に変化したとするとき、沸点はＴ0 からＴ1 （Ｔ
1 ＞Ｔ0 ）に変化する。このとき図３のような低温容器
のモデルを想定し、以下のような諸量を考慮する。 ・容器内の低温液体の質量 Ｍ ・容器内の低温液体の蒸発潜熱 ｌ（Ｔ） ・容器内の低温液体の比熱 Ｃp （Ｔ） ・容器内の低温液体に対する侵入熱 Ｗ 低温液体がＴ0 からＴ1 に達する時間ｔは、[0010] The pressure in the cryogenic vessel is increased from P 0 to P 1 (P 1 >
P 0 ), the boiling point changes from T 0 to T 1 (T 0
1 > T 0 ). At this time, a model of the low-temperature container as shown in FIG. 3 is assumed, and the following quantities are considered. The mass of the cryogenic liquid in the container M The latent heat of evaporation of the cryogenic liquid in the container l (T) The specific heat of the cryogenic liquid in the container C p (T) The heat of penetration of the cryogenic liquid in the container W The cryogenic liquid is T 0 The time t from T to T 1 is
【００１１】[0011]
【数１】 (Equation 1)
【００１２】この時間ｔの間、侵入熱は液体に蓄熱され
蒸発は停止する。逆にＰ1 からＰ0に圧力を下げると、
蓄熱された熱量が放出されかつ比容積が変化するため、
δＶ´だけ容積は減少する。During this time t, the penetrating heat is stored in the liquid and the evaporation stops. Reducing the pressure from P 1 to P 0 Conversely,
Because the stored heat is released and the specific volume changes,
The volume decreases by δV ′.
【００１３】[0013]
【数２】 上述した低温液体固有の特性（原理）を利用して低温液
体の圧力を制御する手段を低温容器に設けることによ
り、液面位を制御することができる。本実施例によれば
次のような効果を奏する。 ａ．液量・保持時間の延長(Equation 2) By providing means for controlling the pressure of the low-temperature liquid in the low-temperature container using the above-described characteristic (principle) inherent in the low-temperature liquid, the liquid level can be controlled. According to this embodiment, the following effects can be obtained. a. Extension of liquid volume and retention time
【００１４】例えば、侵入熱１０〜１５Ｗ程度の３００
０ｌヘリウム容器の場合、内圧を０．１ｋｇ／ｃｍ2 ・
Ｇ上昇させると、約７〜８時間の間、液体ヘリウムの蒸
発を抑えることができ、かつ液容積が３〜５％（９０〜
１５０ｌ）程度増加する。 ｂ．低温液体の補充困難な場合のサポート機能 緊急に低温液体の補充が必要となった場合であって、か
つ低温液体が十分に存在していない場合でも圧力調整に
よって液容積を維持できる。 ｃ．低温液体の液面位緊急降下 緊急に液面位を降下させたい場合においても、圧力調整
によって極めて短時間の間に液面位を降下させ得る。な
お、本発明は上述した実施例に限定されるものではな
く、本発明の要旨を逸脱しない範囲で種々変形実施可能
であるのは勿論である。For example, 300 of about 10 to 15 W of intrusion heat is used.
In the case of a 0 l helium container, the internal pressure is 0.1 kg / cm 2 ・
When G is increased, evaporation of liquid helium can be suppressed for about 7 to 8 hours, and the liquid volume becomes 3 to 5% (90 to 90%).
About 150 l). b. Support function when replenishment of low-temperature liquid is difficult It is possible to maintain the liquid volume by adjusting the pressure even when replenishment of low-temperature liquid is urgently required and sufficient low-temperature liquid is not present. c. Emergency drop of liquid level of low-temperature liquid Even when urgently lowering the liquid level, the liquid level can be lowered in a very short time by adjusting the pressure. It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.
【００１５】[0015]
【発明の効果】本発明によれば、低温液体容器内の圧力
調整を行なうだけで、液面位を制御できるので、上記容
器に低温液体の補充を行なわずに液面位を所要レベルに
維持・増加もしくは減少させることのできる低温液体容
器用液面調整装置を提供できる。According to the present invention, since the liquid level can be controlled only by adjusting the pressure in the low-temperature liquid container, the liquid level is maintained at a required level without replenishing the container with the low-temperature liquid. A liquid level adjusting device for a low-temperature liquid container that can be increased or decreased can be provided.
【図１】本発明の一実施例に係る低温液体容器用液面調
整装置の構成を示す図。FIG. 1 is a diagram showing a configuration of a liquid level adjusting device for a low-temperature liquid container according to an embodiment of the present invention.
【図２】液体ヘリウムの性質を示す図で、（ａ）は温度
−密度の関係を示す図、（ｂ）は温度−潜熱との関係を
示す図、（ｃ）は温度−比熱の関係を示す図。2A and 2B are diagrams showing properties of liquid helium, where FIG. 2A shows a relationship between temperature and density, FIG. 2B shows a relationship between temperature and latent heat, and FIG. 2C shows a relationship between temperature and specific heat. FIG.
【図３】原理説明のための低温容器のモデルを示す図。FIG. 3 is a diagram showing a model of a low-temperature container for explaining the principle.
【図４】従来の低温液体容器用液面調整装置の一例を示
す構成図。FIG. 4 is a configuration diagram showing an example of a conventional liquid level adjusting device for a low-temperature liquid container.
２…低温液体 ３…低温液体容器
（クライオスタット） ４…容器 ５…ガス供給用の
弁 ６…圧力調整弁 ７…ガス源、 ８…ガス放出用の弁 ９…低温容器内圧
監視用圧力計 １０…汎用の弁 １１…供給管 １２…内圧調整用排気ポンプ2 ... low-temperature liquid 3 ... low-temperature liquid container (cryostat) 4 ... container 5 ... valve for gas supply 6 ... pressure regulating valve 7 ... gas source, 8 ... valve for gas release 9 ... pressure gauge for monitoring the internal pressure of the low-temperature container 10 ... General-purpose valve 11 ... Supply pipe 12 ... Exhaust pump for internal pressure adjustment
Claims (2)
性を有する低温液体を収容する低温液体容器内における
前記低温液体の液面位を調整するための低温液体容器用
液面調整装置において、 前記 低温液体容器の圧力を制御して、前記低温液体の比
容積を制御する比容積制御手段と、この比容積制御手段
により比容積を制御される前記低温液体の蓄熱及び又は
放熱を行って前記低温液体の蒸発量を制御する蒸発量制
御手段とを備え、前記低温液体容器内の圧力調整を行な
うことによって液面位を制御するようにしたことを特徴
とする低温液体容器用液面調整装置。(1) The specific volume is increased by increasing the pressure.
In a cryogenic liquid container containing cryogenic liquid
For cryogenic liquid containers for adjusting the liquid level of the cryogenic liquid
In the liquid level adjusting device, by controlling the pressure of the cryogenic liquid container, and a specific volume control means for controlling the specific volume of the cryogenic liquid, the heat storage and the cold liquid to be controlled specific volume The specific volume control means or evaporation system for controlling the amount of evaporation of the cryogenic liquid to radiate the heat
Control means for controlling the pressure in the low-temperature liquid container to control the liquid level.
に接続され、外部から供給されるガス量を調整するガス
供給用弁と、前記低温液体容器に接続され、外部へガス
を放出する量を調整するガス放出用弁と、前記低温液体
容器に接続され、容器内の圧力を調整する排気ポンプと
を具備することを特徴とする請求項１に記載の低温液体
容器用液面調整装置。 2. The low-temperature liquid container according to claim 2 , wherein
Gas that adjusts the amount of gas supplied from the outside
Connected to the supply valve and the cryogenic liquid container,
A gas discharge valve for adjusting the amount of gas discharged, and the low-temperature liquid
An exhaust pump connected to the container and adjusting the pressure inside the container
The cryogenic liquid according to claim 1, comprising:
Liquid level adjustment device for containers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33156692A JP3337249B2 (en) | 1992-12-11 | 1992-12-11 | Liquid level adjustment device for cryogenic liquid containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33156692A JP3337249B2 (en) | 1992-12-11 | 1992-12-11 | Liquid level adjustment device for cryogenic liquid containers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06181342A JPH06181342A (en) | 1994-06-28 |
| JP3337249B2 true JP3337249B2 (en) | 2002-10-21 |
Family
ID=18245096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33156692A Expired - Fee Related JP3337249B2 (en) | 1992-12-11 | 1992-12-11 | Liquid level adjustment device for cryogenic liquid containers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3337249B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4866001B2 (en) * | 2004-12-10 | 2012-02-01 | 大陽日酸株式会社 | Superconducting coil cooling and holding device |
-
1992
- 1992-12-11 JP JP33156692A patent/JP3337249B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06181342A (en) | 1994-06-28 |
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